Review Exercise (1) 1. Which The Following Is The Net Ionic Equation For The Reaction Between Hydrochloric Acid and Potassium Hydroxide?
Review Exercise (1) 1. Which The Following Is The Net Ionic Equation For The Reaction Between Hydrochloric Acid and Potassium Hydroxide?
Review Exercise (1) 1. Which The Following Is The Net Ionic Equation For The Reaction Between Hydrochloric Acid and Potassium Hydroxide?
1. Which the following is the net ionic equation for the reaction
between hydrochloric acid and potassium hydroxide?
A. HCL (aq) + KOH (aq) H2 O (1) + KCL (aq)
B. K (aq) + CL (aq)
+ -
KCL (aq)
C. K (aq) + CL (aq)
+ -
KCL (s)
D. H (aq) + OH- (aq)
+
H2 O(1)
ii. The reaction between silver nitrate and sodium chride to form silver
chloride and sodium nitrate is an example of a ________reaction.
A. Direct combination
B. Simple displacement
C. Double displacement
D. Decomposition
A. 0.50M B. 0.05M
C. 0.20M D. 0.01M
iv. What mass of sulphuric acid (H2SO4)is found in 400 cm3 of its 0.1M
aqueous solution?
A. 2.45 G
B. 9.80 G
C. 4.90 G
D. 3.92 G
v. What volume of hydrogen gas is produced when 0.65 g of zinc reacts
completely exess hydrochloric acid at STP? (Zn = 65)
A. 224 CM3
B. 22.4 cm3
C. 22.4 dm3
D. 2.24 cm3
ii. What volume of 6.00M hydrochloric acid is needed to prepare 1.5 dm3
of 0.200M hydrochloric acid solution (H=1, Cl=35.5)
A. 1800cm3
B. 125 cm3
C. 50cm3
D. 150.01
iv. What is the molar concentration of solution containing 1.75 moles of the
solute in 3 litres of solution?
A. 5.25 M
B. 1.71M
C. 0.583M
D. 1.75M
iv. The equation below shows a reaction between oxygen and hydrogen
gases to form water: 2H2 (g) + O2(g) 2 H2 O (g)
Which of the following describes what would happen if the pressure is
increased?
A. There would be no change in the system
B. More water molecules would be formed.
C. Some water molecules would decompose to form hydrogen and oxygen
gases.
D. The gaseous water molecules would condense to form liquid water.
ii. In the blast furnace, iron ore is converted to iron metal. Which of the
following statements about the blast furnace is not true?
A. The reaction in the blast furnace produce a lot of heat which keeps the
iron molten.
B. Limestone is reacted with the impurities to form slag.
C. Coke is added to reduce iron oxide to iron metal
D. Coke combines with some impurities in the ore.
ii. Sodium hydroxide was added to three different test tubes, X,Y and Z.
blue, green and reddish-brown precipitates were formed, respectively.
The metal ions present in test tubes X,Y and Z in the respective are likely
to be:
A. Ca2+, Pb2+ and Al3+
B. Cu2+, Fe2+ and Fe3+
C. Ag+, Pb2+ and Mg2+
D. Pb2+, Mg2+ and Ca3+
iii. Which of the following is the correct ionic equation that shows the
reaction between sodium hydroxide and dilute nitric acid:
A. NaOH (aq) = HNO3(aq) NaNO3 (aq) + H2O(1)
B. OH (aq) + H (aq)
- +
H2O(1)
C. Na (aq) + NO3 (aq)
+ –
NaNO3 (aq)
D. Na +NO3 –(aq) + H+NO3 –(aq) Na+NO3 -(aq) + H2 O(1)
vi. Which of the following metal nitrates will not give a metal oxide on
heating?
A. Copper nitrate
B. Lead nitrate
C. Calcium nitrate
D. Silver nitrate
vii.Which of the following pairs of compounds can be used to test for the
presence of chloride ions in a solution?
A. Nitric acid and silver nitrate solution
B. Barium chloride and sodium hydroxide solutions
C. Aqueous ammonia and silver nitrate solution
D. Nitric acid and sodium chloride
vii. 28 cm3 od a gas weighs 04.4 g at STP. Calculate the molecular mass of
the gas.
A. 22
B. 12
C. 43
D. 2
viii. A nitrogen molecule forms covalent bonds. How many electrons are
shared between nitrogen atoms?
A. 2 electrons
B. 3 electrons
C. 6 electrons
D. 4 electrons
ix. The reaction that can proceed on either direction by changing the
condition that governs the reaction is called ______
A. Endothermic reaction
B. Displacement reaction
C. Reversible reaction
D. Exothermic reaction
x. The formula for potassium bicarbonate is KHCO3. How many moles are
equivalent to 25 g of this compound?
A. 0.5
B. 0.25
C. 1
D. 50